Tait TP9400 User Manual - 132  Glossary

132  Glossary

RF 

Radio Frequency, the part of the 

electromagnetic spectrum that is suitable for 

radio transmissions. The frequency of the RF 

signal is described in terms of the number of 

cycles per second or Hertz (Hz).

RSSI 

Received Signal Strength Indicator, an icon or 

number that shows the strength of a received 

signal.

T

traffic channel

The traffic channel is the channel on a 

trunking system to which the parties 

participating in a call are directed to for the 

duration of the call. When the call ends, the 

traffic channel is returned to the pool of 

channels for use in a new call.

trunking 

operation

In trunking operation, the trunking system 

manages the communications channels used 

by the radio, and shares a number of channels 

among a large number of radio users.

V

valid signal 

A valid signal is a signal that the radio 

responds to by unmuting the receiver. 

A signal may be valid, for example, when it is 

stronger than a minimum level or has special 

signaling that matches the signaling 

programmed for the receiving radio.